Wow, and yet so typical, that what is an obvious place to look for a votive offering/coin stash was the last place to be looked, rather than wandering around a field in a remote part of Britain with a metal detector.

The Frome Hoard is a hoard of 52,503 Roman coins found in April 2010 by metal detectorist Dave Crisp near Frome in Somerset, England. The coins were contained in a ceramic pot 45 cm (18 in) in diameter, and date from AD 253 to 305. Most of the coins are made from debased silver or bronze. The hoard is one of the largest ever found in Britain, and is also important as it contains the largest group ever found of coins issued during the reign of Carausius, who ruled Britain independently from 286 to 293 and was the first Roman emperor to strike coins in Britain.

Sam Moorhead of the Portable Antiquities Scheme suggests that in this case the pot was so large and fragile that it could not have been easily recovered without breaking it, and so the hoard may represent communal votive offerings to the gods.

Being pedantic, not the same county, but very close to one another. I actually went to school in Bath, when it was in a county called Avon, and with boundary changes it is now classed under the horrific county name of BANES (Bath And North East Somerset), which is a different county to Somerset, where Frome is situated.

And I think that one of the problems with finding hoards like this in Bath, is that the city is extremely restrictive on new builds. So property is excessively expensive, mainly made of Bath stone, and has been made to last. The chances are that there are lots of coins buried there, but in a densely populated area with little new building work, or buildings being demolished for new properties to be built, many hoards will probably never have the chance to see the light of day.